Wavelet transformation of images has proved to be a valuable
means for extracting spatial features for target detection
and recognition, but application of this technique has been
limited by the computational requirements of the wavelet transform.
Tanner Labs has developed an innovative, compact analog circuit
that computes the continuous wavelet transform in real-time
for video sequences. Moreover, the user can continuously vary
the transform's scale properties.
Our wavelet transformer chip could be used to augment existing
video and other imaging systems used by search and rescue
teams, marine research facilities, and environmental and bio-hazard
monitoring agencies. Similarly, military applications could
consist of detecting ground vehicles, ammo depots, or even
individual soldiers, hidden behind vegetation or partially
obscured by smoke. The sharp, even edges of a truck body or
shipping crates would stand out in the wavelet transformed
image as quite distinct from the natural, random edges of
shrubbery or clouds of smoke.
This research has been sponsored by the U.S. Navy under the